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Resolved Re: Active connections to PostgreSQL

  1. How-to
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  1. Sivaprakash BKR
    Sivaprakash BKR
  2. PowerBuilder
  3. Saturday, 8 January 2022 06:15 AM UTC

Hello,

PB 2019 R3, PostgreSQL 11

While querying the PostgreSQL database, with the following query

SELECT username, application_name, client_hostname
FROM pg_stat_activity
WHERE datname = 'database'
And state = 'active' ;

I get empty in application_name and null in client_hostname.   I want to show correct values for application_name and hostname.  Is there any way to set these values in Powerbuilder so that those values will get displayed when running the above query?

I use the following values to connect to a database from PB

DBMS=ODBC
ServerName=<serverIP>
LogId=<logid>
LogPassword=<pass>
Database=<database>
DBParm="ConnectString='Driver=PostgreSQL Unicode;Database=<database>;Server=<serverIP>;Port=<port>;UID=<logid>;PWD=<pass>',DisableBind=1"
Driver=PostgreSQL Unicode
Port=<port>
Lock="RC"

Happiness Always
BKR Sivaprakash

 

  1. PostgreSQL
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Accepted Answer
mike S
mike S Accepted Answer Pending Moderation
  1. Saturday, 8 January 2022 13:59 PM UTC
  2. PowerBuilder
  3. # Permalink

for my connection string i have both APP and CON set to my application name, but i'm not sure if they work and most likely app= does not.  I  haven't looked in a while and not sure if i ever verified it.  my postgresql database is not currently running so i can't really test:

"APP=" + ls_appname + ";"
"CON=" + ls_appname

 

stack overflow says:

postgresql - Set Applicationname when using Postgres ODBC driver - Stack Overflow

 

which indicates an execute immediate should work after the connection:

set application_name = ‘<application>’

 

Comment
Sivaprakash BKR
  1. Sivaprakash BKR
  2. Saturday, 8 January 2022 14:42 PM UTC
set application_name='MYNAME' works.

Thanks, mike S.
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Responses (2)
Miguel Leeuwe
Miguel Leeuwe Accepted Answer Pending Moderation
  1. Saturday, 8 January 2022 12:41 PM UTC
  2. PowerBuilder
  3. # 1

Hi BKR,

I don't know anything about Postgresql, but it appears that "statistics recollection" can be configured in several ways. Maybe it's simply not set to collect the data you need?

https://www.postgresql.org/docs/current/monitoring-stats.html#MONITORING-PG-STAT-ACTIVITY-VIEW

regards.

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